diff --git a/src/alpine/install/firefox/install_firefox.sh b/src/alpine/install/firefox/install_firefox.sh
index 1b33ba1..a25c92b 100644
--- a/src/alpine/install/firefox/install_firefox.sh
+++ b/src/alpine/install/firefox/install_firefox.sh
@@ -20,6 +20,14 @@ done
 
 # Creating a default profile
 firefox -headless -CreateProfile "kasm $HOME/.mozilla/firefox/kasm"
+
+# For alpine 3.20 and later, firefox version shows a security nag. Silence it.
+if [ "$(printf '%s\n' 3.20 $(cat /etc/alpine-release) | sort -V | head -n 1)" = "3.20" ]; then
+  echo 'user_pref("security.sandbox.warn_unprivileged_namespaces", false);' > $HOME/.mozilla/firefox/kasm/user.js
+  chown 1000:1000 $HOME/.mozilla/firefox/kasm/user.js
+fi
+
+
 # Generate a certdb to be detected on squid start
 HOME=/root firefox --headless &
 mkdir -p /root/.mozilla